KB: EXPERIENCE LEVELS decoded -- the 0x25c block is the simulation-mode flags

The egg's per-pilot 'experience' (novice/standard/veteran/expert) is the
pod's simulation-fidelity tier -- stored at BTMission+0xe4 and seeded into
the BTPlayer ctor's flag block @4c0bc8 [T1].  The old 'per-role display
toggles / returnFromDeath' reading was WRONG: the source is
mission->experienceLevel, and the neighboring pair copies
mission->advancedDamageOn (the egg's technician splash/collision switch),
not role floats.  Known consumers: 0x260 = the HEAT-MODEL master switch
(FUN_004ad7d4), 0x25c = the novice sim-lockout (jams/searchlight/powersub),
0x274 = the raw level (FUN_004ac9c8 ==0 novice predicate).

NEW established topic context/experience-levels.md (data path, binary flag
rows per level, manual cross-refs, corrections log) + router row; sweeps in
decomp-reference/gauges-hud/open-questions/pod-hardware/subsystems.
btplayer.cpp/.hpp re-annotated with the corrected semantics; the guarded
role-based seeding stays as a marked [T3] stand-in (slot drift vs the
binary switch documented inline) until the wiring task points it at
BTMission::ExperienceLevel().

(Research by the parallel context session; committed from the glass line.)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

CLAUDE.md

@@ -67,6 +67,7 @@ precise than anything you can infer.
 | Walking, gait, ground model, collision | `context/locomotion.md` |
 | Subsystems, the factory, heat/weapons/power | `context/subsystems.md` |
 | Damage zones, targeting, firing, death | `context/combat-damage.md` |
+| Experience / simulation modes (novice/standard/veteran/expert), heat-model + novice gates | `context/experience-levels.md` |
 | Rendering, LODs, materials, sky, shadows, beams | `context/rendering.md` |
 | The death/respawn translocation warp (tsphere vortex) | `context/translocation-warp.md` |
 | First-person cockpit canopy (*_cop) + the eyepoint camera | `context/cockpit-view.md` |